Sorry, I guess I lost track of the 10 gallon criteria. Hypothetically, if it were a 10 gallon tank, I would have made the same stupid mistake. I like this thread...learning what not to do._________________"There he is!! Quick, look really hungry!"

55. Cutting out the whole back section of your plastic 10 gallon hood/lid so you can watch the fishies from above only to find your neat new betta dead as a doornail on the floor the next morning (in my defense I was a beginner when I did this).

56. Buy a 1' CAE from the fish store around the corner, because it wasn't bothering any of the tetras or angelfish in the small tank it was in, so it must be pretty docile.

57. Buy a diseased $10 baby fish (the species you've been looking for for months, but can't find anywhere else) from that sketchy fish store, where the owner just wants to make a quick buck, because he's mostly into selling Marine/Discus/FH.

58. Dumping as much meds/salt in the tank as you can, and raising the temperature to try to heal that sick fish really quickly, because you don't want the disease to spread, right?

Sorry, I hope I didn't kill this one... the list could go on and on...

60. Not a 10 gallon, but how about putting super hot tap water into a small Betta tank. This was my daughters first attempt at cleaning her Betta Tank unsupervised._________________Happy Fish Keeping!!!